The diagram below shows a simple system that turn dirty water into clean water. Summarise the information by selecting and reporting the main features, and make comparisions where relevant.

The diagram illustrates how unclean

water

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is filtered

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into

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to

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into

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drinkable

water

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. The system is operated through the

water

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-filter assembly which contains two major parts, the above

storage

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drum and the

storage

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drum. The

filting

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filing

fitting

filtering

procedures start with pouring the dirty

water

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into the above

storage

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drum after lifting up its plastic lid. In the above

storage

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drum, there are three layers which are sand, charcoal, and gravel

follow

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following

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the position order from the top to the bottom. These are the materials which can absorb the unclean substances from the

water

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and filter the

water

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gradually. The processed

water

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then

Linking Words

is taken into a plastic barrel which connects the two drums. Through the barrel, the

water

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which is ready for drinking flows into the

storage

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drum where people can

aquire

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acquire

clean

water

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from the tap attached.